Yami o Terasu Mono takes place at some undetermined point in the future in Vol City, a metropolis build around a volcano. One day, Ryuuga Dougai arrives in the city, drawn in by its high concentration of evil spirits known as Horrors, the ones plaguing Vol City being Madou Horrors. Ryuuga is, in fact, a Makai Knight and the latest knight to bear the title of Garo the Golden Knight. However, Garo's
